could pervert
Regular verb: pervert - perverted- perverted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pervert
you could pervert
she could pervert
we could pervert
you could pervert
they could pervert 	I could be perverting
you could be perverting
she could be perverting
we could be perverting
you could be perverting
they could be perverting	I could have perverted
you could have perverted
she could have perverted
we could have perverted
you could have perverted
they could have perverted	I could have been perverting
you could have been perverting
she could have been perverting
we could have been perverting
you could have been perverting
they could have been perverting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't pervert
you couldn't pervert
she couldn't pervert
we couldn't pervert
you couldn't pervert
they couldn't pervert 	I couldn't be perverting
you couldn't be perverting
she couldn't be perverting
we couldn't be perverting
you couldn't be perverting
they couldn't be perverting	I couldn't have perverted
you couldn't have perverted
she couldn't have perverted
we couldn't have perverted
you couldn't have perverted
they couldn't have perverted	I couldn't have been perverting
you couldn't have been perverting
she couldn't have been perverting
we couldn't have been perverting
you couldn't have been perverting
they couldn't have been perverting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pervert?
could you pervert?
could she pervert?
could we pervert?
could you pervert?
could they pervert? 	could I be perverting?
could you be perverting?
could she be perverting?
could we be perverting?
could you be perverting?
could they be perverting? 	could I have perverted?
could you have perverted?
could she have perverted?
could we have perverted?
could you have perverted?
could they have perverted? 	could I have been perverting?
could you have been perverting?
could she have been perverting?
could we have been perverting?
could you have been perverting?
could they have been perverting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I pervert?
couldn't you pervert?
couldn't she pervert?
couldn't we pervert?
couldn't you pervert?
couldn't they pervert? 	couldn't I be perverting?
couldn't you be perverting?
couldn't she be perverting?
couldn't we be perverting?
couldn't you be perverting?
couldn't they be perverting? 	couldn't I have perverted?
couldn't you have perverted?
couldn't she have perverted?
couldn't we have perverted?
couldn't you have perverted?
couldn't they have perverted? 	couldn't I have been perverting?
couldn't you have been perverting?
couldn't she have been perverting?
couldn't we have been perverting?
couldn't you have been perverting?
couldn't they have been perverting?